<template>
	<div :style="style" class="top-right-btn">
		<el-row>
			<el-tooltip v-if="search" :content="showSearch ? '隐藏搜索' : '显示搜索'" class="item" effect="dark" placement="top">
				<el-button circle icon="Search" @click="toggleSearch()"/>
			</el-tooltip>
			<el-tooltip class="item" content="刷新" effect="dark" placement="top">
				<el-button circle icon="Refresh" @click="refresh()"/>
			</el-tooltip>
			<el-tooltip v-if="columns" class="item" content="显隐列" effect="dark" placement="top">
				<el-button v-if="showColumnsType == 'transfer'" circle icon="Menu" @click="showColumn()"/>
				<el-dropdown v-if="showColumnsType == 'checkbox'" :hide-on-click="false" style="padding-left: 12px" trigger="click">
					<el-button circle icon="Menu"/>
					<template #dropdown>
						<el-dropdown-menu>
							<template v-for="item in columns" :key="item.key">
								<el-dropdown-item>
									<el-checkbox :checked="item.visible" :label="item.label" @change="checkboxChange($event, item.label)"/>
								</el-dropdown-item>
							</template>
						</el-dropdown-menu>
					</template>
				</el-dropdown>
			</el-tooltip>
		</el-row>
		<el-dialog v-model="open" :title="title" append-to-body>
			<el-transfer
					v-model="value"
					:data="columns"
					:titles="['显示', '隐藏']"
					@change="dataChange"
			></el-transfer>
		</el-dialog>
	</div>
</template>

<script setup>
const props = defineProps({
	/* 是否显示检索条件 */
	showSearch: {
		type: Boolean,
		default: true,
	},
	/* 显隐列信息 */
	columns: {
		type: Array,
	},
	/* 是否显示检索图标 */
	search: {
		type: Boolean,
		default: true,
	},
	/* 显隐列类型（transfer穿梭框、checkbox复选框） */
	showColumnsType: {
		type: String,
		default: 'checkbox',
	},
	/* 右外边距 */
	gutter: {
		type: Number,
		default: 10,
	},
})

const emits = defineEmits(['update:showSearch', 'queryTable'])

// 显隐数据
const value = ref([])
// 弹出层标题
const title = ref('显示/隐藏')
// 是否显示弹出层
const open = ref(false)

const style = computed(() => {
	const ret = {}
	if (props.gutter) {
		ret.marginRight = `${props.gutter / 2}px`
	}
	return ret
})

// 搜索
function toggleSearch() {
	emits('update:showSearch', !props.showSearch)
}

// 刷新
function refresh() {
	emits('queryTable')
}

// 右侧列表元素变化
function dataChange(data) {
	for (let item in props.columns) {
		const key = props.columns[item].key
		props.columns[item].visible = !data.includes(key)
	}
}

// 打开显隐列dialog
function showColumn() {
	open.value = true
}

if (props.showColumnsType == 'transfer') {
	// 显隐列初始默认隐藏列
	for (let item in props.columns) {
		if (props.columns[item].visible === false) {
			value.value.push(parseInt(item))
		}
	}
}

// 勾选
function checkboxChange(event, label) {
	props.columns.filter(item => item.label == label)[0].visible = event
}

</script>

<style lang='scss' scoped>
:deep(.el-transfer__button) {
	border-radius: 50%;
	display: block;
	margin-left: 0px;
}

:deep(.el-transfer__button:first-child) {
	margin-bottom: 10px;
}

:deep(.el-dropdown-menu__item) {
	line-height: 30px;
	padding: 0 17px;
}
</style>
